How can two 100% identical files have different sizes?

Question

I have two 100% identical empty .sh shell script files on Mac:

• encrypt.sh: 299 bytes
• decrypt.sh: 13 bytes (Actually this size is correct, since I have 13 bytes: 11 character + two new line)

The contents of encrypt.sh and its hexdump:

The contents of decrypt.sh and its hexdump:

The file info window of encrypt.sh :

The file info window of decrypt.sh :

They have the exact same hexdump, then how is it possible that they have different sizes?

Answer 1

Mac OS X file system is implementing forks, so the larger one is likely having something specific stored in its resource fork .

Use ls -l@ to get more details.